“A group of China-linked hackers that has mowed through the databanks of major American health insurers and stolen personnel records of U.S. military and intelligence agencies has struck at the heart of the nation’s air-travel system,” according to Bloomberg .  

“Sabre Corp., which processes reservations for hundreds of airlines and thousands of hotels, confirmed that its systems were breached recently, while American Airlines Group Inc., the world’s biggest carrier, said it is investigating whether hackers had entered its computers.”  

“Both companies were hacked as part of the same wave of attacks that targeted insurer Anthem Inc. and the U.S. government’s personnel office… The plundered information would add to a trove already believed to include personal and employment details from background checks on millions of government employees and contractors, as well as medical histories. A foreign government could use the data to build profiles of U.S. officials and contractors, establishing information that could be used to blackmail them into providing intelligence. A government could also track the travel of U.S. officials and workers to detect military or intelligence operations, or compare their movements with those of its own citizens.”